Source/Sprite.cpp

   1 /*
   2 Copyright (C) 2003, 2010 - Wolfire Games
   3
   4 This file is part of Lugaru.
   5
   6 Lugaru is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2 of the License, or
   9 (at your option) any later version.
  10
  11 Lugaru is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with Lugaru.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "Sprite.h"
  21 #include "Person.h"
  22 #include "Game.h"
  23 extern XYZ viewer;
  24 extern float viewdistance;
  25 extern float fadestart;
  26 extern int environment;
  27 extern float texscale;
  28 extern Light light;
  29 extern float multiplier;
  30 extern float gravity;
  31 extern Terrain terrain;
  32 extern Objects objects;
  33 extern int detail;
  34 extern XYZ viewerfacing;
  35 extern int bloodtoggle;
  36 extern XYZ windvector;
  37
  38 // init statics
  39 Texture Sprite::cloudtexture;
  40 Texture Sprite::cloudimpacttexture;
  41 Texture Sprite::bloodtexture;
  42 Texture Sprite::flametexture;
  43 Texture Sprite::bloodflametexture;
  44 Texture Sprite::smoketexture;
  45 Texture Sprite::snowflaketexture;
  46 Texture Sprite::shinetexture;
  47 Texture Sprite::splintertexture;
  48 Texture Sprite::leaftexture;
  49 Texture Sprite::toothtexture;
  50
  51 float Sprite::checkdelay = 0;
  52
  53 vector<Sprite*> Sprite::sprites = vector<Sprite*>();
  54
  55 //Functions
  56 void Sprite::Draw()
  57 {
  58     int k;
  59     static float M[16];
  60     static XYZ point;
  61     static float distancemult;
  62     static int lasttype;
  63     static int lastspecial;
  64     static int whichpatchx, whichpatchz;
  65     static XYZ start, end, colpoint;
  66     static bool check;
  67     static bool blend;
  68     static float tempmult;
  69     static XYZ difference;
  70     static float lightcolor[3];
  71     static float viewdistsquared = viewdistance * viewdistance;
  72     static XYZ tempviewer;
  73
  74     tempviewer = viewer + viewerfacing * 6;
  75     check = 0;
  76
  77     lightcolor[0] = light.color[0] * .5 + light.ambient[0];
  78     lightcolor[1] = light.color[1] * .5 + light.ambient[1];
  79     lightcolor[2] = light.color[2] * .5 + light.ambient[2];
  80
  81     checkdelay -= multiplier * 10;
  82
  83     if (checkdelay <= 0) {
  84         check = 1;
  85         checkdelay = 1;
  86     }
  87
  88     lasttype = -1;
  89     lastspecial = -1;
  90     glEnable(GL_BLEND);
  91     glDisable(GL_LIGHTING);
  92     glDisable(GL_CULL_FACE);
  93     glEnable(GL_TEXTURE_2D);
  94     blend = 1;
  95     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
  96     glDepthMask(0);
  97     glAlphaFunc(GL_GREATER, 0.0001);
  98     for (unsigned i = 0; i < sprites.size(); i++) {
  99         if (lasttype != sprites[i]->type) {
 100             switch (sprites[i]->type) {
 101             case cloudsprite:
 102                 cloudtexture.bind();
 103                 if (!blend) {
 104                     blend = 1;
 105                     glAlphaFunc(GL_GREATER, 0.0001);
 106                     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 107                 }
 108                 break;
 109             case cloudimpactsprite:
 110                 cloudimpacttexture.bind();
 111                 if (!blend) {
 112                     blend = 1;
 113                     glAlphaFunc(GL_GREATER, 0.0001);
 114                     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 115                 }
 116                 break;
 117             case breathsprite:
 118                 cloudimpacttexture.bind();
 119                 if (!blend) {
 120                     blend = 1;
 121                     glAlphaFunc(GL_GREATER, 0.0001);
 122                     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 123                 }
 124                 break;
 125             case smoketype:
 126                 smoketexture.bind();
 127                 if (!blend) {
 128                     blend = 1;
 129                     glAlphaFunc(GL_GREATER, 0.0001);
 130                     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 131                 }
 132                 break;
 133             case bloodsprite:
 134                 bloodtexture.bind();
 135                 if (!blend) {
 136                     blend = 1;
 137                     glAlphaFunc(GL_GREATER, 0.0001);
 138                     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 139                 }
 140                 break;
 141             case splintersprite :
 142                 if (lastspecial != sprites[i]->special) {
 143                     if (sprites[i]->special == 0)
 144                         splintertexture.bind();
 145                     if (sprites[i]->special == 1)
 146                         leaftexture.bind();
 147                     if (sprites[i]->special == 2)
 148                         snowflaketexture.bind();
 149                     if (sprites[i]->special == 3)
 150                         toothtexture.bind();
 151                     if (!blend) {
 152                         blend = 1;
 153                         glAlphaFunc(GL_GREATER, 0.0001);
 154                         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 155                     }
 156                 }
 157                 break;
 158             case snowsprite:
 159                 snowflaketexture.bind();
 160                 if (!blend) {
 161                     blend = 1;
 162                     glAlphaFunc(GL_GREATER, 0.0001);
 163                     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 164                 }
 165                 break;
 166             case weaponshinesprite:
 167                 shinetexture.bind();
 168                 if (blend) {
 169                     blend = 0;
 170                     glAlphaFunc(GL_GREATER, 0.001);
 171                     glBlendFunc(GL_SRC_ALPHA, GL_ONE);
 172                 }
 173                 break;
 174             case flamesprite:
 175             case weaponflamesprite:
 176                 flametexture.bind();
 177                 if (blend || lasttype == bloodflamesprite) {
 178                     blend = 0;
 179                     glAlphaFunc(GL_GREATER, 0.3);
 180                     glBlendFunc(GL_SRC_ALPHA, GL_ONE);
 181                 }
 182                 break;
 183             case bloodflamesprite:
 184                 bloodflametexture.bind();
 185                 if (blend) {
 186                     blend = 0;
 187                     glAlphaFunc(GL_GREATER, 0.3);
 188                     glBlendFunc(GL_ONE, GL_ZERO);
 189                 }
 190                 break;
 191             }
 192         }
 193         if (sprites[i]->type == snowsprite)
 194             distancemult = (144 - (distsq(&tempviewer, &sprites[i]->position) - (144 * fadestart)) * (1 / (1 - fadestart))) / 144;
 195         else
 196             distancemult = (viewdistsquared - (distsq(&viewer, &sprites[i]->position) - (viewdistsquared * fadestart)) * (1 / (1 - fadestart))) / viewdistsquared;
 197         if (sprites[i]->type == flamesprite) {
 198             if (distancemult >= 1)
 199                 glColor4f(sprites[i]->color[0], sprites[i]->color[1], sprites[i]->color[2], sprites[i]->opacity);
 200             else
 201                 glColor4f(sprites[i]->color[0], sprites[i]->color[1], sprites[i]->color[2], sprites[i]->opacity * distancemult);
 202         } else {
 203             if (distancemult >= 1)
 204                 glColor4f(sprites[i]->color[0]*lightcolor[0], sprites[i]->color[1]*lightcolor[1], sprites[i]->color[2]*lightcolor[2], sprites[i]->opacity);
 205             else
 206                 glColor4f(sprites[i]->color[0]*lightcolor[0], sprites[i]->color[1]*lightcolor[1], sprites[i]->color[2]*lightcolor[2], sprites[i]->opacity * distancemult);
 207         }
 208         lasttype = sprites[i]->type;
 209         lastspecial = sprites[i]->special;
 210         glMatrixMode(GL_MODELVIEW);
 211         glPushMatrix();
 212         glTranslatef(sprites[i]->position.x, sprites[i]->position.y, sprites[i]->position.z);
 213         if ((sprites[i]->type == flamesprite || sprites[i]->type == weaponflamesprite || sprites[i]->type == weaponshinesprite)) {
 214             difference = viewer - sprites[i]->position;
 215             Normalise(&difference);
 216             glTranslatef(difference.x * sprites[i]->size / 4, difference.y * sprites[i]->size / 4, difference.z * sprites[i]->size / 4);
 217         }
 218         if (sprites[i]->type == snowsprite) {
 219             glRotatef(sprites[i]->rotation * .2, 0, .3, 1);
 220             glTranslatef(1, 0, 0);
 221         }
 222         glGetFloatv(GL_MODELVIEW_MATRIX, M);
 223         point.x = M[12];
 224         point.y = M[13];
 225         point.z = M[14];
 226         glLoadIdentity();
 227         glTranslatef(point.x, point.y, point.z);
 228
 229         glRotatef(sprites[i]->rotation, 0, 0, 1);
 230
 231         if ((sprites[i]->type == flamesprite || sprites[i]->type == weaponflamesprite || sprites[i]->type == weaponshinesprite || sprites[i]->type == bloodflamesprite)) {
 232             if (sprites[i]->alivetime < .14)
 233                 glScalef(sprites[i]->alivetime / .14, sprites[i]->alivetime / .14, sprites[i]->alivetime / .14);
 234         }
 235         if (sprites[i]->type == smoketype || sprites[i]->type == snowsprite || sprites[i]->type == weaponshinesprite || sprites[i]->type == breathsprite) {
 236             if (sprites[i]->alivetime < .3) {
 237                 if (distancemult >= 1)
 238                     glColor4f(sprites[i]->color[0]*lightcolor[0], sprites[i]->color[1]*lightcolor[1], sprites[i]->color[2]*lightcolor[2], sprites[i]->opacity * sprites[i]->alivetime / .3);
 239                 if (distancemult < 1)
 240                     glColor4f(sprites[i]->color[0]*lightcolor[0], sprites[i]->color[1]*lightcolor[1], sprites[i]->color[2]*lightcolor[2], sprites[i]->opacity * distancemult * sprites[i]->alivetime / .3);
 241             }
 242         }
 243         if (sprites[i]->type == splintersprite && sprites[i]->special > 0 && sprites[i]->special != 3) {
 244             if (sprites[i]->alivetime < .2) {
 245                 if (distancemult >= 1)
 246                     glColor4f(sprites[i]->color[0]*lightcolor[0], sprites[i]->color[1]*lightcolor[1], sprites[i]->color[2]*lightcolor[2], sprites[i]->alivetime / .2);
 247                 else
 248                     glColor4f(sprites[i]->color[0]*lightcolor[0], sprites[i]->color[1]*lightcolor[1], sprites[i]->color[2]*lightcolor[2], distancemult * sprites[i]->alivetime / .2);
 249             } else {
 250                 if (distancemult >= 1)
 251                     glColor4f(sprites[i]->color[0]*lightcolor[0], sprites[i]->color[1]*lightcolor[1], sprites[i]->color[2]*lightcolor[2], 1);
 252                 else
 253                     glColor4f(sprites[i]->color[0]*lightcolor[0], sprites[i]->color[1]*lightcolor[1], sprites[i]->color[2]*lightcolor[2], 1);
 254             }
 255         }
 256         if (sprites[i]->type == splintersprite && (sprites[i]->special == 0 || sprites[i]->special == 3)) {
 257             if (distancemult >= 1)
 258                 glColor4f(sprites[i]->color[0]*lightcolor[0], sprites[i]->color[1]*lightcolor[1], sprites[i]->color[2]*lightcolor[2], 1);
 259             else
 260                 glColor4f(sprites[i]->color[0]*lightcolor[0], sprites[i]->color[1]*lightcolor[1], sprites[i]->color[2]*lightcolor[2], 1);
 261         }
 262
 263         glBegin(GL_TRIANGLES);
 264         glTexCoord2f(1.0f, 1.0f);
 265         glVertex3f( .5 * sprites[i]->size, .5 * sprites[i]->size, 0.0f);
 266         glTexCoord2f(0.0f, 1.0f);
 267         glVertex3f(-.5 * sprites[i]->size, .5 * sprites[i]->size, 0.0f);
 268         glTexCoord2f(1.0f, 0.0f);
 269         glVertex3f( .5 * sprites[i]->size, -.5 * sprites[i]->size, 0.0f);
 270         glTexCoord2f(0.0f, 0.0f);
 271         glVertex3f(-.5 * sprites[i]->size, -.5 * sprites[i]->size, 0.0f);
 272         glTexCoord2f(1.0f, 0.0f);
 273         glVertex3f( .5 * sprites[i]->size, -.5 * sprites[i]->size, 0.0f);
 274         glTexCoord2f(0.0f, 1.0f);
 275         glVertex3f(-.5 * sprites[i]->size, .5 * sprites[i]->size, 0.0f);
 276         glEnd();
 277         glPopMatrix();
 278     }
 279     tempmult = multiplier;
 280     for (unsigned i = sprites.size() - 1; i >= 0; i--) {
 281         multiplier = tempmult;
 282         if (sprites[i]->type != snowsprite) {
 283             sprites[i]->position += sprites[i]->velocity * multiplier;
 284             sprites[i]->velocity += windvector * multiplier;
 285         }
 286         if (sprites[i]->type == flamesprite || sprites[i]->type == smoketype)
 287             sprites[i]->position += windvector * multiplier / 2;
 288         if ((sprites[i]->type == flamesprite || sprites[i]->type == weaponflamesprite || sprites[i]->type == weaponshinesprite || sprites[i]->type == bloodflamesprite))
 289             multiplier *= sprites[i]->speed * .7;
 290         sprites[i]->alivetime += multiplier;
 291
 292         if (sprites[i]->type == cloudsprite || sprites[i]->type == cloudimpactsprite) {
 293             sprites[i]->opacity -= multiplier / 2;
 294             sprites[i]->size += multiplier / 2;
 295             sprites[i]->velocity.y += gravity * multiplier * .25;
 296         }
 297         if (sprites[i]->type == breathsprite) {
 298             sprites[i]->opacity -= multiplier / 2;
 299             sprites[i]->size += multiplier / 2;
 300             if (findLength(&sprites[i]->velocity) <= multiplier) {
 301                 sprites[i]->velocity = 0;
 302             } else {
 303                 XYZ slowdown;
 304                 slowdown = sprites[i]->velocity * -1;
 305                 Normalise(&slowdown);
 306                 slowdown *= multiplier;
 307                 sprites[i]->velocity += slowdown;
 308             }
 309         }
 310         if (sprites[i]->type == snowsprite) {
 311             sprites[i]->size -= multiplier / 120;
 312             sprites[i]->rotation += multiplier * 360;
 313             sprites[i]->position.y -= multiplier;
 314             sprites[i]->position += windvector * multiplier;
 315             if (sprites[i]->position.y < tempviewer.y - 6) sprites[i]->position.y += 12;
 316             if (sprites[i]->position.y > tempviewer.y + 6) sprites[i]->position.y -= 12;
 317             if (sprites[i]->position.z < tempviewer.z - 6) sprites[i]->position.z += 12;
 318             if (sprites[i]->position.z > tempviewer.z + 6) sprites[i]->position.z -= 12;
 319             if (sprites[i]->position.x < tempviewer.x - 6) sprites[i]->position.x += 12;
 320             if (sprites[i]->position.x > tempviewer.x + 6) sprites[i]->position.x -= 12;
 321         }
 322         if (sprites[i]->type == bloodsprite) {
 323             bool spritehit = 0;
 324             sprites[i]->rotation += multiplier * 100;
 325             sprites[i]->velocity.y += gravity * multiplier;
 326             if (check) {
 327                 XYZ where, startpoint, endpoint, movepoint, footpoint;
 328                 float rotationpoint;
 329                 int whichtri;
 330
 331                 for (unsigned j = 0; j < Person::players.size(); j++) {
 332                     if (!spritehit && Person::players[j]->dead && sprites[i]->alivetime > .1) {
 333                         where = sprites[i]->oldposition;
 334                         where -= Person::players[j]->coords;
 335                         if (!Person::players[j]->skeleton.free)
 336                             where = DoRotation(where, 0, -Person::players[j]->yaw, 0);
 337                         startpoint = where;
 338                         where = sprites[i]->position;
 339                         where -= Person::players[j]->coords;
 340                         if (!Person::players[j]->skeleton.free)
 341                             where = DoRotation(where, 0, -Person::players[j]->yaw, 0);
 342                         endpoint = where;
 343
 344                         movepoint = 0;
 345                         rotationpoint = 0;
 346                         whichtri = Person::players[j]->skeleton.drawmodel.LineCheck(&startpoint, &endpoint, &footpoint, &movepoint, &rotationpoint);
 347                         if (whichtri != -1) {
 348                             spritehit = 1;
 349                             Person::players[j]->DoBloodBigWhere(0, 160, sprites[i]->oldposition);
 350                             DeleteSprite(i);
 351                         }
 352                     }
 353                 }
 354
 355                 whichpatchx = sprites[i]->position.x / (terrain.size / subdivision * terrain.scale);
 356                 whichpatchz = sprites[i]->position.z / (terrain.size / subdivision * terrain.scale);
 357                 if (whichpatchx > 0 && whichpatchz > 0 && whichpatchx < subdivision && whichpatchz < subdivision)
 358                     if (terrain.patchobjectnum[whichpatchx][whichpatchz]) {
 359                         if (!spritehit)
 360                             for (int j = 0; j < terrain.patchobjectnum[whichpatchx][whichpatchz]; j++) {
 361                                 k = terrain.patchobjects[whichpatchx][whichpatchz][j];
 362                                 start = sprites[i]->oldposition;
 363                                 end = sprites[i]->position;
 364                                 if (!spritehit)
 365                                     if (objects.model[k].LineCheck(&start, &end, &colpoint, &objects.position[k], &objects.yaw[k]) != -1) {
 366                                         if (detail == 2 || (detail == 1 && abs(Random() % 4) == 0) || (detail == 0 && abs(Random() % 8) == 0))
 367                                             objects.model[k].MakeDecal(blooddecalfast, DoRotation(colpoint - objects.position[k], 0, -objects.yaw[k], 0), sprites[i]->size * 1.6/*+abs((float)(Random()%100))/2400*/, .5, Random() % 360);
 368                                         DeleteSprite(i);
 369                                         spritehit = 1;
 370                                     }
 371                             }
 372                     }
 373                 if (!spritehit)
 374                     if (sprites[i]->position.y < terrain.getHeight(sprites[i]->position.x, sprites[i]->position.z)) {
 375                         terrain.MakeDecal(blooddecalfast, sprites[i]->position, sprites[i]->size * 1.6/*+abs((float)(Random()%100))/2400*/, .6, Random() % 360);
 376                         DeleteSprite(i);
 377                     }
 378             }
 379         }
 380         if (sprites[i]->type == splintersprite) {
 381             sprites[i]->rotation += sprites[i]->rotatespeed * multiplier;
 382             sprites[i]->opacity -= multiplier / 2;
 383             if (sprites[i]->special == 0 || sprites[i]->special == 2 || sprites[i]->special == 3)
 384                 sprites[i]->velocity.y += gravity * multiplier;
 385             if (sprites[i]->special == 1)
 386                 sprites[i]->velocity.y += gravity * multiplier * .5;
 387         }
 388         if (sprites[i]->type == flamesprite || sprites[i]->type == weaponflamesprite || sprites[i]->type == weaponshinesprite || sprites[i]->type == bloodflamesprite) {
 389             sprites[i]->rotation += multiplier * sprites[i]->rotatespeed;
 390             sprites[i]->opacity -= multiplier * 5 / 4;
 391             if (sprites[i]->type != weaponshinesprite && sprites[i]->type != bloodflamesprite)
 392                 if (sprites[i]->opacity < .5 && sprites[i]->opacity + multiplier * 5 / 4 >= .5 && (abs(Random() % 4) == 0 || (sprites[i]->initialsize > 2 && Random() % 2 == 0)))
 393                     MakeSprite(smoketype, sprites[i]->position, sprites[i]->velocity, .9, .9, .6, sprites[i]->size * 1.2, .4);
 394             if (sprites[i]->alivetime > .14 && (sprites[i]->type == flamesprite)) {
 395                 sprites[i]->velocity = 0;
 396                 sprites[i]->velocity.y = 1.5;
 397             }
 398         }
 399         if (sprites[i]->type == smoketype) {
 400             sprites[i]->opacity -= multiplier / 3 / sprites[i]->initialsize;
 401             sprites[i]->color[0] -= multiplier;
 402             sprites[i]->color[1] -= multiplier;
 403             sprites[i]->color[2] -= multiplier;
 404             if (sprites[i]->color[0] < .6)
 405                 sprites[i]->color[0] = .6;
 406             if (sprites[i]->color[1] < .6)
 407                 sprites[i]->color[1] = .6;
 408             if (sprites[i]->color[2] < .6)
 409                 sprites[i]->color[2] = .6;
 410             sprites[i]->size += multiplier;
 411             sprites[i]->velocity = 0;
 412             sprites[i]->velocity.y = 1.5;
 413             sprites[i]->rotation += multiplier * sprites[i]->rotatespeed / 5;
 414         }
 415         if (sprites[i]->opacity <= 0 || sprites[i]->size <= 0)
 416             DeleteSprite(i);
 417     }
 418     if (check)
 419         for (unsigned i = sprites.size() - 1; i >= 0; i--) {
 420             sprites[i]->oldposition = sprites[i]->position;
 421         }
 422     glAlphaFunc(GL_GREATER, 0.0001);
 423     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 424 }
 425
 426 void Sprite::DeleteSprite(int i)
 427 {
 428     sprites.erase(sprites.begin() + i);
 429 }
 430
 431 void Sprite::MakeSprite(int atype, XYZ where, XYZ avelocity, float red, float green, float blue, float asize, float aopacity)
 432 {
 433     if (sprites.size() < max_sprites - 1) {
 434         sprites.push_back(new Sprite());
 435         if ((atype != bloodsprite && atype != bloodflamesprite) || bloodtoggle) {
 436             sprites.back()->special = 0;
 437             sprites.back()->type = atype;
 438             sprites.back()->position = where;
 439             sprites.back()->oldposition = where;
 440             sprites.back()->velocity = avelocity;
 441             sprites.back()->alivetime = 0;
 442             sprites.back()->opacity = aopacity;
 443             sprites.back()->size = asize;
 444             sprites.back()->initialsize = asize;
 445             sprites.back()->color[0] = red;
 446             sprites.back()->color[1] = green;
 447             sprites.back()->color[2] = blue;
 448             sprites.back()->rotatespeed = abs(Random() % 720) - 360;
 449             sprites.back()->speed = float(abs(Random() % 100)) / 200 + 1.5;
 450         }
 451     }
 452 }
 453
 454 Sprite::Sprite()
 455 {
 456     oldposition = 0;
 457     position = 0;
 458     velocity = 0;
 459     size = 0;
 460     initialsize = 0;
 461     type = 0;
 462     special = 0;
 463     memset(color, 0, sizeof(color));
 464     opacity = 0;
 465     rotation = 0;
 466     alivetime = 0;
 467     speed = 0;
 468     rotatespeed = 0;
 469 }
 470
 471 void Sprite::clearTextures()
 472 {
 473     toothtexture.destroy();
 474     cloudtexture.destroy();
 475     cloudimpacttexture.destroy();
 476     bloodtexture.destroy();
 477     flametexture.destroy();
 478     bloodflametexture.destroy();
 479     smoketexture.destroy();
 480     snowflaketexture.destroy();
 481     shinetexture.destroy();
 482     splintertexture.destroy();
 483     leaftexture.destroy();
 484 }
 485